NCC216652_MODIFICATION Supporting Documents_20230201 (2)

U / / �� - i ��D --- o C4- --333
32� -- ' i I �� i ------ ----- o w ------------
� - ------
_ i ' i
- 5 - ----_ LO _ \
�� �� --- ----- - o �LOD____ j y
� � � TREE PROTECTION � �° \
Q / �� - - - - - - ti o-LOD - - - _ _FENCE (TYP.) SEME
/ our 331.0 - -MCP&L EA 994)-
i / Il�/- yRP 93(1
336� �p6 5951 PG
---------------- � ��3 W�M-LLT-
O Y�016)
- 8q3(6912
o /
28, _----�i
- - - - i/����/
>70
TREE PROTECTION _ _ _ �� _ _- - 11,
/ 330 FENCE (TYP.) '�=w� �- 82°r4'S �W- -
EROSION CONTROL LEGEND
- -
PROPERTY LINE
TCE
TEMPORARY CONSTRUCTION EASEMEN
CL
CLEARING LIMITS
SF
SILT FENCE
TPF
TREE PROTECTION FENCE
> TD
TEMPORARY DIVERSION DITCH
> TD(CW)
CLEAN WATER DIVERSION DITCH
X
SEDIMENT BASIN POROUS BAFFLES
- ---_� - �_-- � v� ���__�i_-- /� In �� \ V� v 5' PUMP DISCHARGE HOSE
o � 32 �8 ra-1 329- 330 _w- - �- _ w � ' - - - _ - yam_ _ -�_-� �_ / - / � - / / / / / � - � � / � -� � � V A � � o � � / EXISTING CONTOUR
LIMITS OF DISTURBANCE (TYP.) G =W- _ - - - , 333 i _ _ _ - - - - __ _- _ I / ti / / TEMPORARY 3 F I
i - �'W- _ _ _ - ' ��� - - - - _ _ - -_ l l / �> A �� / DIVERSION DITCH 805 PROPOSED CONTOUR
SIGN / A V � / \ (TYP.) l i
EASEMENT DRAINAGE AREA BOUNDARY
-Vv �i__--
& Pi�asE�� _ _ _ - � _ I o � � � CE CONSTRUCTION ENTRANCE
r_ - - % _W� � � / / / � � _r _ �- � / / / � � ® SILT FENCE OUTLET
ARTWORK - - T - Gi. o , - / \ \ /
_ / - \ wo V A / CONCRETE WASHOUT STATION
/ / _ _T - - r -I EASEMENT _ _ - -_ - - 34 V /
CD
o / �/ / ROCK CHECK DAM
i
�- j �- �� - TEMPORARY \v \I \I \ �(� //
�- / / V / / s' SKIMMER
DIVERSION DITCH \
/ / (TYP.)
ROCK CHECK TEMPORARY SLOPE DRAIN
/ / / / / / ro
CO
DAMN (TYP.) / / \ I
/ o DESIGNATED AREAS TO BE
/ " / i / / ��� _ �- STABILIZED WITHIN 7 DAYS
/ IT/ qqo�-
SILT FENCE (TYP.) E. �L - - \ V //� /A �320 L TEMPORARY EROSION
/ / '� V A / / / / / / / TT \ CONTROL MATTING
�34g45
0-330-- �// < </�\ v
o / j - - - - / / /�' TOWN OF APEX CONSTRUCTION SEQUENCE
TREE PROTECTION �) / / /� �� - - - _ -_� / / / A / V / �� A The following begins only after Construction Plans are approved,
�� c - ( �a� A / O
_ �- - _ \\\ _ \ \� r, signed by Town staff and copies are received.
.0 FENCE (TYP.) / / - �� �� ( �� _ - - _ _ - - � / V A \
/ / / 3 - _ - _ _ _ - - - _ / / A \ \ i Z - LIMITS OF DISTURBANCE (TYP.) 1. Through the Infrastructure Inspections Manager at (919)
249-3386, schedule a re -construction meeting with
i N P 9
.- - % �
/ � � - - - - - _� 4, s � ) \ � f / 2 � � � � A I inspectors and other Town staff.
s,5» 30�� s / / F- j V p�� - - N87°98'12,,W y 2. Fill out Tree/Protection Fencing Installation Permit Application
(// // r / �� �� �� / �/ (obtain from Plannig Department).
/ Tv / / �- / / / / / / SEDIMENT \
/ / 3. Have a surveyor flag property lines, easements, buffers, tree
BASIN #3 TT/ \ �� - - protection areas, and flag the protection limits.
4. Contact an Apex Planning Department Zoning Compliance
SKIMMER / Officer at [phone] to request approval for tree
// / �/ / / / / / / / / ✓ (TYP.) �S - protection fencing locations.
�� / / / / 5. Install approved tree protection fencing, signs, and/or any
x \ other protection measures that may be required. Call Plannin
u� / / / \ / / / / / / X \w at 249 3426 for a final inspection of protection measures. g
_n� l / / j TEMPORARY / / ( /� �/ / / \ Planning will forward approval to Water Resources, Erosion
i E /) �� j /�� DIVERSION DITCH Control field staff.
u �/ / / ' 5 a (TYP.) / ���j �� o 0 6. Submit the applicable S&E performance guarantee to the
o / / / /� �� z Development Services Manager at 249-3394 in Development
-0 / / a / N / ` / �_ /_! �� \ Services. An invoice can be requested from Water Resources
�- V �� CONSTRUCTION ENTRANCE (TYP.) at [phone]. The erosion control Letter of Plan
`3731Pi Approval will not be issued until the guarantee has been
� o ) a ���- ��% / / - �_ _� �����/ �� EMERGENCY / � submitted. The guarantee will be returned once all Stormwater
// / / SPILLWAY (TYP.) _ - Control Measures (SCMs) have been converted and accepted
by the Town, all temporary erosion control measures have
o �
4 been removed and the site is 100% permanently stabilized.
o 7. Request a Letter of Plan Approval for sedimentation and
o / 0 / ( CONCRETE WASHOUT (TYP.) ��
/ //�� _ j / / / erosion control measures from Water Resources staff at (919)
� / tJ M 362-8166. ol
U%Jti S"'-��® 8. Complete and submit an electronic Notice of Intent a-NOI
l) / V form NCDEMLR requesting a Certificate of Coverage
)
\, \\ _�� �, oa q 9 9
- /) � �� �� i / � ��\V� � / � � � '� (COC) under the NCG01 Construction Stormwater General
Permit. Visit the following website:
/ \ �j/ �� �� �� /� �Q1 https: //deq.nc.gov/about/divisions/energy-mineral-land-
o / // / � �� / / �, / -� SILT FENCE (TYP.) �/ resources energy-mineral-landpermits/
/ O\� storm water- perm its/con struction-sw.
CONSTRUCTION ENTRANCE (TYP.) �/ 3 /� /% / u, �\ A / / 9. Complete a Grading Permit Application and receive a Grading
/ / / / / Permit from the Building Inspections & Permitting Department
�� / / J j as required by the North Carolina Building Code Appendix J
/ /) _ 1 �\ / \ / / �'� a for Grading. Both the Grading Permit and Certificate of
Coverage from NCDEMLR must be submitted to the
CONCRETE WASHOUT (TYP.) A I I Environmental Field Services Supervisor prior to the
> f commencement of any land disturbance activity.
/ � � � � � � � i � ..� / � � / 10. Install gravel construction entrance, temporary diversions, silt o ) / �� / / TEMPORARY O / - A y fencing, sediment basins, bypass channels, and/or other
DIVERSION DITCH
/ � � / / �/ �_ �� / measures as shown on the approved plans. Clear only as
QT, / \ / / A, f j� ( (TYP.) / �� �'I necessary to install these devices.
i 11. When completed, call Water Resources staff at (919)
\ 362-8166 for an on -site inspection and to request a
P
Certificate of Compliance. Water Resources will also forward a
/ / ��� ✓/ - �� J VA\ /V / V
copy to the Building Inspections &Permitting Department.
E v / i A�� - I \7
� � � � / � / ) / �/� �� -� /// V\ � 1- I 12. Post Grading Permit prominently on site at all times.
�(V5��, � 13. Begin clearing, grubbing, and rough grade of the site in
5' ETBACK FROM BUFFER �� �� �� �� /VA ��� \ V V I accordance with the approved grading plan.
\ / SF 1 / /gF toile a sufficient amount of 14. Stockpile topsoil to cover 3 inches
\ 30' T E BUFFER / / i / /� j/ ) A V �� I
/ / / �� \ �� L over landscaped areas at the end of the project.
V - -7� 15. Install storm sewer, if applicable, and protect inlets with inlet
// �\ ��37 V \ protection devices, sediment devices, and/or other approved
o \ 28 / l/ \ \ _ )l \� measures as shown on lane. Maintain S&E measures as
Q T_ _ l � i - - / / ' i // >A�\/ / l lll l I P
sF F /�// �i /
'3 v BAFFLE �29 s� i /i // /� /�l l� \ V needed.
16. After completion of an phase of grading or when
TYP. \ � / / // / / _ V � ) P Y P 9 9
�� SEDIMENT (TYP.) �V ii / ��//��� \ / /�/// // y V I land -disturbing activities have temporarily ceased, establish
0-) 'U0 a) BASIN 1 / -� �33 �� �� (//A� �6 ��� \ �I
/ �/ / //// = //// / 1j groundcover on swales and ditches and graded slopes steeper
/ / / /� / /�/ \ A V A /� //���/ than 3:1 within 7 calendar days; slopes that are 3:1 or
// / j \ // / flatter must establish groundcover within 14 calendar days.
/ / / PHASE 1 CONSTRUCTION SEQUENCE
�- - 32S I \ / / = // 17. Stabilize site as areas are brought up to finished grade with
- �� �� j // ��� l/��/�/ / \ A �/// 1. INSTALL TREE PROTECTION FENCE. CALL TROUTMAN TREE CONSERVATION INSPECTOR vegetation or paving.
° EMERGENCY FOR APPROVAL OF TREE PROTECTION FENCING. 18. Prior to plot approval, all disturbed areas both public and
/ // / private, must be properly stabilized. All temporary erosion
\32 SPILLWAY TYP. / / \ ) / // / /o P P P Y P Y
4 (TYP.) / J // /// UPON APPROVAL BY WAKE COUNTY -LAND QUALITY SECTION, BEGIN CLEARING, control measures must be installed, be functioning properly
o / S t \ \ �� / / \\ // / / /� \ /� 2. OBTAIN I LAND DISTURBING PERMIT FROM WAKE COUNTY -LAND QUALITY SECTION ANDg• and be maintained for the entire area contained within the
-°1y \ 5' SETBACK / - / /// \ / / // // / / POST ORIGINAL PERMIT ON -SITE. GRADING, AND DEMOLITION OF SITE, MAINTAINING EROSION CONTROL MEASURES AS
a i / / lat.
/ / / NECESSARY. EROSION CONTROL MEASURES SHALL BE RESTORED TO ORIGINAL
3 < FROM BUFFER-
3. /�/ \ /11/ / / / ( \ / / / %/� DIMENSIONS WHEN SEDIMENT ACCUMULATES TO 50% OF DESIGN DEPTH. 19. Flush and clean all stormwater system pipes. Clean and
n o"v ` 2g -/ J / /� / 3. CONTRACTOR TO SCHEDULE PRE -CONSTRUCTION CONFERENCE ON -SITE WITH TOWN
Q _� / / A� )) i \ / / / / / / / remove sediment from temporary sediment holding devices.
ROCK CHECK BUFFER / �� ��/� )) �) \� //���1/� // / AND WAKE COUNTY -LAND QUALITY SECTION. CONTACT THE STORMWATER CONTROL P Y 9
���// INSPECTOR. 9. INSPECT SITE ONCE A WEEK AND AFTER EVERY RAINFALL EVENT. Follow the SCM Construction Sequence found on the Grading
_ A DAMN (TYP.) ///�///y
/ (/ // AV / ///// / and/or SCM Detail sheet on the Construction Plan set.
- / / �� ���������( //&///%�/ // 4. CALL THE STORMWATER CONTROL INSPECTOR FOR INSPECTION. 20. Remove all temporary diversions, silt fencing, sediment basins,
�a //// /
///// / / / 10. CONTRACTOR SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL DEVICES EVERY etc. and provide adequate cover or pave an resulting bare
P q P Y 9
�\ �I LIMITS OF DISTURBANCE (TYP.) /// 5. INSTALL CONSTRUCTION ENTRANCES, SILT FENCE, INLET PROTECTION, DIVERSION SEVEN (7) CALENDAR DAYS AND AFTER EVERY RAINFALL EVENT. DAMAGED OR areas. All permanent erosion control devices should be
\ \ '\ \ � \ � � / / � \\\\� \�\ _ _ / / {�j DITCHES, COIR MATTING, COMPOST SOCKS, AND SEDIMENT BASINS. DISTURBANCE INEFFECTIVE DEVICES SHALL BE REPLACED IMMEDIATELY. installed at this point.
11 \ �� ® _ , / \ \\\\ _ - / /�/ SHALL BE LIMITED TO THE INSTALLATION OF THESE DEVICES ONLY.
s °4•°� �� �T9 / OUTLET ��VA�/ '� V 11. ALL DISTURBED AREA WHERE WORK HAS CEASED SHALL BE STABILIZED WITHIN
o s oa �- CONSTRUCTION /
-� _ �� / PROTECTION V ����� 6. DIVERSION DITCHES TO BE STABILIZED IMMEDIATELY AFTER INSTALLATION. FOURTEEN (14) CALENDAR DAYS.
ENTRANCE (TYP.) - � NSF OUTLET (TYP.)
(TYP.)
�> 7. CALL WAKE COUNTY -LAND QUALITY SECTION INSPECTOR FOR INSPECTION OF EROSION 12. CALL STORMWATER CONTROL INSPECTOR FOR INSPECTION PRIOR TO TRANSITION TO
E \� �� TD TD
NPDES GROUND COVER REQUIREMENTS / ���' \ = - /// / CONTROL MEASURES. PHASE 2.
o
0
o �
0
0
z �
cn Q
z �
Ln
n
� � A
Ci
u
u
0
U
n
a �
� L
Q
n
L �
� o
n
E
SITE AREA DESCRIPTION
STABILIZATION
TIME FRAME EXCEPTIONS
PERIMETER DIKES, SWALES,
7 DAYS
NONE
DITCHES, SLOPES
HIGH QUALITY WATER
7 DAYS
NONE
(HQW) ZONES
IF SLOPES ARE 10' OR
SLOPES STEEPER THAN 3:1
7 DAYS
LESS IN LENGTH AND ARE
NOT STEEPER THAN 2:1.
14 DAYS ARE ALLOWED.
7 DAYS FOR SLOPES
SLOPES 3:1 OR FLATTER
14 DAYS
GREATER THAN 50'IN
LENGTH
ALL OTHER AREAS WITH
14 DAYS
NONE EXCEPT FOR
SLOPES FLATTER THAN 4:1
PERIMETERS AND HQW
ZONES.
LIMIT OF DISTURBANCE: 18.16 ACRES
- M
o
1 ~
\- __T
BAFFLE
(TYP.)
��� \ SEDIMENT
BASIN #2
k '
k
k
SKIMMER
\ (TYP.)
_� 3//__
o
SF OUTLET (TYP.)
NX
37 ;
Skimmer Basin 1
DESIGN INFORMATION
TOTAL DRAINAGEAREA
2.80
AC
TOTAL DISTURBED AREA
2.80
AC
TO
5
MIN
RATIONAL C
0.34
DESIGN STORM INTENSITY
7.24
IN/HR
PEAK FLOW
6.89
CFS
DESIGN CALCULATIONS
SURFACEAREA REQUIRED
2,240
SF
SURFACEAREA PROVIDED
3,200
SF
VOLUME REQUIRED
5,040
CF
DEWATERING TIME
3.46
DAYS
VOLUMEPROVIDED
5,695
CF
EMBANKMENT WIDTH
5
FT
EMERGENCY SPILLWAY LENGTH
8.0
FT
EMERGENCY SPILLWAY CAPACITY
8.5
CFS
SKIMMER SIZE
2.50
IN
SKIMMER ORIFICE DIAMETER
1.25
IN
SKIMMER OUTLET ELEVATION
1 323.501
FT
BASIN GEOM ETRY
AREA (SF)
ELEV (FT)
BOTTOM OF BASIN:
1356
324.0
PRIMARY SPILLWAY ELEVATION:
3200
326.5
TOP OF DAM:
4127
328.0
Skimmer Basin 2
DESIGN INFORMATION
TOTAL DRAINAGE AREA
9.87
AC
TOTAL DISTURBED AREA
9.87
AC
Tc
5
MIN
RATIONAL C
0.27
DESIGN STORM INTENSITY
7.24
IN/HR
PEAK FLOW
19.44
CFS
DESIGN CALCULATIONS
SURFACE AREA REQUIRED
6,319
SF
SURFACE AREA PROVIDED
3,200
SF
VOLUME REQUIRED
17,771
CF
DEWATERING TIME
3.46
DAYS
VOLUME PROVIDED
5,695
CF
EMBANKMENT WIDTH
5
FT
EMERGENCY SPILLWAY LENGTH
2O.0
FT
EMERGENCY SPILLWAY CAPACITY
21.2
CFS
SKIMMER SIZE
2.50
IN
SKIMMER ORIFICE DIAMETER
1.25
IN
SKIMMER OUTLET ELEVATION
323.50
FT
BASIN GEOMETRY
AREA (SF)
ELEV (FT)
BOTTOM OF BASIN:
1356
324.0
PRIMARYSPILLWAYELEVATION:
3200
326.5
TOP OF DAM:
4127
328.0
Skimmer Basin 3
DESIGN INFORMATION
TOTAL DRAINAGE AREA
4.03
AC
TOTAL DISTURBED AREA
4.03
AC
Tc
5
MIN
RATIONAL C
0.28
DESIGN STORM INTENSITY
7.24
WHIR
PEAK FLOW
8.17
CFS
DESIGN CALCULATIONS
SURFACE AREA REQUIRED
2,655
SF
SURFACE AREA PROVIDED
3,200
SF
VOLUME REQUIRED
7,254
CF
DEWATERING TIME
3.46
DAYS
VOLUME PROVIDED
5,695
CF
EMBANKMENT WIDTH
5
FT
EMERGENCY SPILLWAY LENGTH
8.0
FT
EMERGENCY SPILLWAY CAPACITY
8.5
CFS
SKIMMER SIZE
2.50
IN
SKIMMER ORIFICE DIAMETER
1 1.251
IN
SKIMMER OUTLET ELEVATION
1 323.501
FT
BASIN GEOMETRY
AREA (SF)
ELEV (FT)
BOTTOM OF BASIN:
1356
324.0
PRIMARYSPILLWAYELEVATION:
3200
326.5
TOP OF DAM:
4127
328.0
GRAPHIC SCALE IN FEET
0 25 50 100
THE SIGNATURES AFFIXED BELOW CERTIFY THAT THIS SHEET HAS BEEN REVIEWED AND APPROVED
SOLELY PER THE CERTIFICATIONS SIGNED ON THE COVER SHEET OF THESE CONSTRUCTION PLANS.
N/A
NA
5­21 PM
PUBLIC WORKS 2-oTRANSPORTATION
WATER RESOURCES - STORMWATFR
N/A
PM
F A. Veds
wens01I24I20231106
BUILDING INSPECTIONS NIA
PLANNING
smiller 01 /24/2023 13344 PM
�� Aprovede�
WATER RESOURCES - UTILITY ENGINEERING
PLANNING - TRANSPORTATION
N/A
rs ith 01/19/2023 6:61:51 PM
N/A
knee -h oll-33;as 23 PM
ELECTRIC
FIRE N / A
APerzPunved
incke 01/19/2023 1.22.16 PM
WATER RESOURCES - SOIL & EROSION
PARKS, RECREATION & CULTURAL
CONTROL
RESOURCES
m
N
N
N
N
N
\
\
\
\
\
w
o
0
0
0
z
z
z
z
z
w
w
w
w
w
0
0
0
0
0
z
O
O
O
O
O
O
w
O
O
O
O
O
IY
CL
CL
CL
CL
CL
a_
a_
a_
a_
a_
IUnI�t ter,
0
N
z z
o
vi =
N
O
w CDr
H- w
r-
Mr
Q J
Q
9
O w
� o
� O
0
�-o
z
X a�
C:) w
Q O
N
zQ
w =
O
zcnow
ON J
O H-
�
=
w
I�
ei
w H
co
J L
J
N>
N W
W
o �
z
N 1--
O
■�
@
w
N
*�,ti�k�ylYllllllff}�}
w
=� LAL
' 258
'f}�a 10R14,11 22
N
w
O
U O
N
O
O
LLCD
=i)
O o
O
wO
-- \
Un
}
m
Q -
C:)
Q
o
m
m
o
Q
\
z
z
Y
I O
�
w
-1
c�
C)Q
C
U
w
Q
CL
w
S
J
0
O
U
Z
O
V_
W
Q
z
U
J
O
J
Z
Q
O
W
u
C)
_
0
O
C)
WLL
Q
_
o
�
=
W
0
<
a
Z^Z�2Q
I..L
a
LU
J
w
'�
v /
V v7
Q
I-
0
O
Z
O
SHEET NUMBER
C4.0

No. REVISIONS
DATE BY
Kimley)))Horn
© 2023 KIMLEY—HORN AND ASSOCIATES, INC.
421 FAYETTEVILLE STREET, SUITE 600, RALEIGH, NC 27601
PHONE: [phone]
WWW.KIMLEY—HORN.COM
KHA PROJECT
013804000
DATE
01/30/2023
SCALE AS SHOWN
DESIGNED BY KEJ
DRAWN BY KEJ
CHECKED BY COB
TMSA - HIGH SCHOOL
NEW HILL OLIVE CHAPEL RD AND AMBERLIGHT RD
APEX WAKE COUNTY NORTH CAROLINA
LIMITS OF DISTURBANCE
EXHIBIT
PREPARED FOR
LEGACY IMPACT CAPITAL
SHEET NUMBER
EX-1